Question

At equilibrium, reaction $A\leftrightharpoons B$ is at the stage of half completion. Which one of the followings is true?

• A. $△G^{\circ }=0$
• B. $△G^{\circ }>0$
• C. $△G^{\circ }<0$
• D. $△G^{\circ }=-RTln2$

Answer 1

The correct option is A $△G^{\circ }=0$

At the stage of half completion of the reaction

$\left[A\right]=\left[B\right]$

$K_{eq}=\frac{\left[B\right]}{\left[A\right]}=1$

$△G^{\circ }=-RTln{k}_{eq}=0$